The X-16 was a belt-fed variation of the Bren, designed for the British Army's GPMG trials in 1957. It competed against numerous other machine guns, including the very similar Enfield X-11, the M60, the FN MAG and the AA-52. The FN MAG was eventually adopted and designated the L7A1 GPMG, and thus the X-16 was cancelled and abandoned. Reports suggest the X-16 was very efficient and well-designed.